Variable Valve Actuation
Our system is for OEMs challenged with meeting future transient emissions and fuel economy targets at a lower overall system cost.
Benefits: Two-step Variable
Valve Actuation
Improves engine out NOx emissions
Reduces fuel
consumption
Keeps aftertreatment system hot
Quality assured
during low load operation to lower emissionsMore performance benefits
- Optimizes compression ratio vs load
- Improves transient response when compared to Fixed Miller
- Improves emissions by keeping the aftertreatment system hot during low load operation
- Faster warm up of engine and aftertreatment system
- Developed with over 60 years of engine brake and integrated valvetrain experience
- Provides the benefits of a fully-flexible VVA system with a less complex, lower cost system
- Higher engine braking power due to increased compression ratio
Flexible Solutions
- Compatible with other valvetrain technologies such as cylinder deactivation and engine braking
- Available for multiple valvetrain and fuel types including diesel, natural gas and hydrogen
- Applicable to all engine displacements, including large engines
A full suite of 2-Step VVA technologies is available. Download our brochure to learn more about the technologies and their unique benefits.
How Jacobs 2-Step VVA works
Using Jacobs proven mechanisms, a variable lift valvetrain provides the means to meet exhaust thermal management, engine performance, and emissions needs.
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